These test tubes with cork are made glass and wood material, small and portable, and can used for a long time. These glass test tubes are versatile and can be used for mixing liquid, store liquid, powder, sample, beads and more. Features - ColorTransparent - Material: Glass, wood - Size: 10.50X1.00X1.00cm/4.13X0.39X0.39in - Glass test tubes, round bottom with wood cork, easy to fill and the lids fit tightly, . - Glass test tubes with cork are versatile tools that can be used for a wide variety of applications, such as storing and transporting small samples. - Smooth and good transparency, widely used in laboratory, research facility, craft, planting, etc. - The glass material of the test tubes allows for clear observation of the contents inside, ensuring accurate and reliable analysis. - The use of glass and wood materials, smooth inner wall, can effectively reduce liquid adsorption. Package list: 20 x glass test tubes